RNA with Enzymatic activity is
**Question:** RNA with Enzymatic activity is
A. tRNA
B. mRNA
C. rRNA
D. snRNA
**Correct Answer:** **C. rRNA**
**Core Concept:** RNA (Ribonucleic Acid) is a biological molecule that plays a crucial role in the storage, expression, and regulation of genetic information in living organisms. It can have enzymatic activity, which means it can act as an enzyme itself, catalyzing specific biochemical reactions. Enzymes are biological catalysts responsible for accelerating the rate of chemical reactions without being consumed in the process.
**Why the Correct Answer is Right:** Ribosomal RNA (rRNA) is a type of ribonucleic acid found in the ribosomes of prokaryotic and eukaryotic cells. Ribosomes are the sites of protein synthesis, where amino acids are linked together to form proteins based on the genetic instructions carried by messenger RNA (mRNA) and ΩΩΩ RNA (tRNA). rRNA is involved in the assembly of ribosomes, the initiation of protein synthesis, and the elongation and termination of protein synthesis.
**Why Each Wrong Option is Incorrect:**
A. tRNA (Transfer RNA) is another type of RNA that carries amino acids to the ribosome for protein synthesis, but it does not have enzymatic activity itself.
B. mRNA (Messenger RNA) carries the genetic instructions from the nucleus to the ribosomes for protein synthesis but is not an enzyme.
D. snRNA (Small nuclear RNA) is involved in the processing of pre-mRNA in the nucleus but does not have enzymatic activity.
**Clinical Pearl:** Understanding the role of RNA in cellular processes is essential for medical students and practitioners as it connects the genetic information to cellular functions and disease pathogenesis. Knowledge of these molecules' structural features, functions, and interactions is crucial for clinical diagnosis, treatment, and prognosis.